Home / 82,871.22-124,308.09-20,541.78

Finding the Fourth Proportional to 82,871.22, 124,308.09 and 20,541.78

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Solution

The fourth proportional to 82,871.22, 124,308.09 and 20,541.78 is: 30,812.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,871.22 : 124,308.09 = 20,541.78 : x
  2. Step 2: Convert to fraction form
    82,871.22/124,308.09 = 20,541.78/x
  3. Step 3: Cross multiply
    82,871.22x = 124,308.09 × 20,541.78
  4. Step 4: Simplify right side
    82,871.22x = 2,553,509,437.00
  5. Step 5: Solve for x
    x = 2,553,509,437.00/82,871.22
  6. Step 6: Final answer
    x = 30,812.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.